1for (int c0 = 2; c0 <= n; c0 += 2) {
2 if (c0 % 4 == 0)
3 S2(c0, c0 / 4);
4 S1(c0, c0 / 2);
5}
6

source code of polly/lib/External/isl/test_inputs/codegen/cloog/nul_basic2.c